[zanata/zanata-platform] f3230f: Use proper variable interpolation format

[GitHub]

  Branch: refs/heads/ZNTA-2201-correctSHA
  Home:   https://github.com/zanata/zanata-platform
  Commit: f3230fa3221ccc2cd7c93eef363757653d0b6b0e
      https://github.com/zanata/zanata-platform/commit/f3230fa3221ccc2cd7c93eef363757653d0b6b0e
  Author: Ding-Yi Chen <dchen at redhat.com>
  Date:   2017-09-15 (Fri, 15 Sep 2017)

  Changed paths:
    M Jenkinsfile

  Log Message:
  -----------
  Use proper variable interpolation format